Winneshiek County Power Outage History
2014–2025 · Iowa
Average — typical outage frequency and duration nationally. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jul 24, 2022 | 19 hrs | 5,712 (60%) | Thunderstorm Wind |
| Dec 16, 2021 | 23 hrs | 5,083 (54%) | Thunderstorm Wind |
| Sep 19, 2020 | 1 hrs | 4,246 (45%) | Unnamed event |
| Jul 19, 2017 | 45 hrs | 3,245 (34%) | Thunderstorm Wind |
| Aug 28, 2021 | 6 hrs | 2,857 (30%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Winneshiek County recorded 316 distinct power outage events, averaging 2.1 hours per event.
The single worst outage on record in Winneshiek County started July 24, 2022 (Thunderstorm Wind), lasting 19 hours and leaving up to 5,712 customers without power (60% of the county) at its peak.
June has historically been the worst month for outages in Winneshiek County, with 45 events recorded during that month across the dataset.
Based on this history, Winneshiek County earns a Reliability Grade of C, placing it in the 57th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Winneshiek County's outage profile
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Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Winneshiek County.
| County | Grade | National percentile |
|---|---|---|
| Sac County | C | 58th |
| Johnson County | C | 58th |
| Allamakee County | C | 58th |
| Webster County | C | 59th |
| Story County | C | 54th |
FAQ
How often does power go out in Winneshiek County?
Between 2014 and 2025, Winneshiek County recorded 316 outage events, averaging 2.1 hours each.
What is Winneshiek County's reliability grade?
Winneshiek County has a Reliability Grade of C, in the 57th national percentile.
What was the worst power outage in Winneshiek County?
The worst outage on record started July 24, 2022 (Thunderstorm Wind), lasting 19 hours and affecting up to 5,712 customers.